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Genome-wide association study reveals the genetic basis of cold tolerance in wheat

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Abstract

Low temperature (LT) is a key environmental stress affecting the growth, development, yield, and quality of wheat (Triticum aestivum L.). To better understand the genetic basis of cold tolerance in wheat, we conducted a genome-wide association study (GWAS) of low-temperature tolerance at the seedling stage. A total of 543 accessions were genotyped by high-density 90K Illumina iSelect single nucleotide polymorphism (SNP) array, based on phenotypic tests in six environments. We detected 63 loci including 76 significant SNPs associated with cold resistance. These significant SNPs were scattered over 18 chromosomes, which associated with 361 unique candidate genes. Furthermore, by combining transcriptome and GWAS analysis, we additionally identified 85 candidate genes related to cold resistance. These results offer new insights into the genetic basis of cold tolerance, and the linkage markers generated in this study should contribute to molecular-assisted breeding of cold tolerance in wheat.

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Data availability

The sequencing reads of Jing411 were submitted to the NCBI GEO database and are accessible under accession number GSE135474 (https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE135474).

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Funding

This research was funded by the National Key Research and Development Program of China (2017YFD0100600) and the Hebei Basic Key Research Program (17966314D).

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XY and JT conceived the project and formulated the scientific objectives; YX, JL, YZ, RZ, KX, and SZ set up the experimental design and performed the data analysis; YZ and JL wrote the draft manuscript; and YZ and XY revised the paper. All authors discussed the results and read and approved the final manuscript for publication.

Corresponding authors

Correspondence to Jichun Tian or Xueju Yang.

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The authors declare that they have no conflict of interest.

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Zhao, Y., Li, J., Zhao, R. et al. Genome-wide association study reveals the genetic basis of cold tolerance in wheat. Mol Breeding 40, 36 (2020). https://doi.org/10.1007/s11032-020-01115-x

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  • DOI: https://doi.org/10.1007/s11032-020-01115-x

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